Steam-pressure-reducing valve.



No. 877,907. PATENTED FEB. 4, 1908. G W COLLIN STEAM PRESSURE REDUCING VALVE.

APPLICATION-P111311 DEG. 2(1. 1906.

. @Qwwiigm George WCoYZz'n the same in a more compact and cheaper man 3, is a further central vertical longitudinal WNTTED STATES GEORGE W. COLLIN, OF BRIDGEPORT, CONNECTICUT.

STEAM-PRESSURE-REDUCING VALVE- Specification of Letters Patent.

Patented Feb. 4, 1908.

Application filed December 20. 1906. $erial No. 348.689-

T 0 all whom it may concern.

Be it known that I, GEORGEW'. COLLIN, a I citizen of the United States, and resident of Bridgeport, in the county of Fairlield and. State of Connecticut, have invented certain new and useful Improvements in Steam- Pressure-Rcducing Valves, of which the following is a specification.

This invention relates to new and useful improvements in steam'pressure reducing valves and has for its objects to generally' improve the constructions of said types of valves.

In a prior patent granted to me October 24th, 1905, 802,496, I have shown a valve of the above general type, and my present invention is an improvement upon said valve, the important objects being to design ner, and so as to be better adapted to the more general uses to which the valve is put.

The advantages as contained in my present invention resides in the improved construction whereby the outletmay be located. directly in line with the inlet, thus producing what I term astraightaway type of valve adapted for connections in a straight line of pipe; further to so construct the. parts as to be able to shorten the length of valve and re duce its weight and finally to arrange the auxiliary or, controlling valve alongside of and in close relation to the main valve though physically unconnected therewith and in a manner to permit of its removal from above, without interfering with the main valve, thus making my valve in its entirety more convenient and desirable in its practicable application and less expensive to manufacture.

Referring to the accompanying drawings, forming a part of this specification similar characters of reference denote like or corresponding parts throughout the several figures and of which,

Figure 1, shows a side elevation of my new type of valve complete. Fig. 2, shows a central vertical longitudinal section through the valve, taken on line 2 2 of Fig. 1. Fig.

section, of a slightly different'form of con struction of valve, said view illustrating the auxiliary valve chamber as formed in a separate but attached part of casing. Fig. 4, is ,1 a plan view of construction shown in Fig. 3,

and Fig. 5, is a detached side elevation of 9 having an outlet 10 directly opposite from inlet 7 and in line therewith, and obviously for connection to distributing or loW pressure service pipe (not shown).

The cylinder 6, cushion chamber 8, and

low pressure chamber 9 are connected by suitable ports 11 and 12 respectively. A valve body 13 is'operatively mounted in said chambers and has a piston 14 to fit the cylinder, a valve 15 to engage the seat of the port 11 and a plunger 16 to iit the outer port 12. The upper end of the cylinder 6 is adapted to receive a detachable closing cap 17 against which may be seated a cushion spring 18 for the piston and further contains a central bearing 19 in which the upper end of stem of valve body operates; When the valve is closed this piston 14 is located about midway of length of cylinder and above the inlet 7 before mentioned, thus dividing the cylinder into an upper and lower compartmentfthe latter being in direct communication with the inlet while the up er side 20 is only connected to the lower side by a small port 21 leading through the said piston. The relative distance of plunger 16 from valve '15 is slightly less than that between their respective ports; consequently an upward or opening movement of the valve body, opens the valve port 1 1 slightly in advance of the plunger port 12, causing the cushion chamber to hold the steam in check pending the further opening of the niain valve thus serving to prevent wearing or wire drawing of said main valve.

An auxiliary valve 22 and its chamber 23 are located beside the main cylinder being arranged vertically and the valve adapted to operate parallel therewith. The said chamber is further connected to the upper portion of said cylinder by a port 24 through the side walls intermediate the said compartments.

I adapted for large types of valves and 41. This attached valve cham er casing is provided with an annular convex rib 42, while The top end of the said auxiliarychamber is provided with a removable threaded plug 25 through which access may be had to the in- -teri0r from above and independent of main sleeve and valve to bear upon and hold the latter against its eat.

A diaphragm 31 is located in 'a suitable chamber 32 of the casing and is secured and supported in position by a hub 33 screwed into said lower portion of auxiliary valve casing. The said diaphragm chamber is connected with the low pressure chamber 9 of valve by a port 34 as shown. The end of lower stem 27 of auxiliary valve is seated against the face of the diaphragm. and said stem and its valve are obviously operated by the movement of said diaphra m. Acollar 35 is movably mounted in the lib 33 andv is held against the back of diaphragm by a spring 36 seated in a tubular extension 37 of hub 33 and intermediate of said collar and a second collar 38 in outer end of tube. Said spring and collar being adjustable to regulate pressure against diaphragm by a screw 39 secured in position by lock nut 40.

Referring to Figs. 3, 4 and 5, I have shown a construction of valve that is es ecially less expensive to produce than the other form. In said design the auxiliary valve chamber is formed in a separable part5 of the casing, being secured to the main casin 5 by screw the adjoining side face of main valve 'body is provided with a corresponding annular concave repess 43 that in practice, registers with said rib. A suitable soft gasket 44 of metal or other material .is located intermediate'the two connecting casings to form a steam tight connection.- In this form the closing cap 17 of top end of cylinder is preferably attached by screw 45 as shown, instead of vbeing threaded and screwed into main casing.

The operationof my valve when connected in a steam system is as follows: The high pressure steani enters lower valve chamber eneath the, iston, causing the same to raise against t e cushioning spring, and first raising the valve from seat 11, admitting steam to cushioning chamber and then opening the lower port 12 chamber to low pressure sideof chamber, or heating systeml The steam flow into the heating system of diaphragm, and raises and act on top of auxiliary valvestem leading from cushion.

is then free to to the desired pressure determined by the adjustment of screw 37, and resistance spring 36 that acts against the lower side of diaphragm. The steam is obviously also free to pass through the port 21, upper chamber 20, port'24nto auxiliary chamber and. out through port 26 to low pressure side 9 of valve or service system. As the steam in system reaches forced out against the spring, away. from end 27 allowing the-aux iliary valve to be forced into its seat by spring 39 thus closing all passage leading from upper chamber 20 thereby causing pressure, to rise therein through port 21 to that of main supply and by reason of the greater area of surface ex ose on top of piston and valve combine pressure will cause the valve body to descend, first closing the port from cushion chamber and then from main valve, which obviously [closes the valve. When the steam in system becomes low and-pressure;

on diaphragm is relieved, the sahi'efl-a ain contacts with and operates auxiliary vave, stem to open said valve relieving pressure from above piston and allowing main steam pressure to again open main valve.

, Having thus described my invention what I claim and desire to secure by Letters Patent 1s 1. In a steam pressure reducing valve, the combination with a casing, containing a main valve chamber and' having 'a side inlet and outlet, a cushion chamber adjoining the ber, ports connecting said chambers, an auxiliary valve chamber beside andindependent of main valve and having a sezparate detachv able closing cap on upper en an auxlliary valve-in longitudinally of casing and to be removed throu h necte withlow pressurechamber to operate auxiliary valve.

2. In a steam pressure reducing valve, the

combination with a casing containinga main valve chamber having a side inlet, a cushion chamber adjoinin a low pressure 0 amber ports connecting said chambers, an outlet from the low pressure chamber directly op osite the inlet to main valve chamber, a va ve body toena ra ve chamber beside and parallel with the main valve chamber and having a detachable.

cap on top end, "an auxiliary valve in sald auxiliary chamber adapted to operate ver' tically andparallel with the main valve and" to be removed through said top end, and a diaphragm connected with low pressure chamber to operate auxiliary valve.

said chamber arranged to operatethe main valve chamber,

desired pressure the diaphragm 31 will be the said steam' said-topside, and a diaphragm cone the seats of ports, a connected auxiliary 3. In a steam pressurereducing valve, the combination with a casing containing a l 1 main valve chamber having a side inlet, a

. 100- maih valve chamber, a low pressure chamcushion chamber adjoining the main valve chamber, a low pressure chamber, ports connecting said chambers, a valve to engage said orts, an auxiliary valve casing attached to t e side of main casing and havin a chamber therein connected with main va ve chamber and a side outlet from loW pressure chamber directly opposite the inlet, anauxiliary valve said auxiliarg ohamber adapted to operate vertically an parallel with the main valve and to be removed through said' top end, and adiaphragrn connected with low pressure chamber and operate auxiliary valve.

Signed at Mansfield, in the county of Rich- 15 land and State of Ohio, this 13 day of Decem- GEORGE COLLIN.

Witnesses: PATRICK J. KELLEY, CHAS. J. PEoK. 

